Is the cheating?

So a while ago I found out my husband was sexting some chick send pictures of his “Hard” and then chest pictures and that and she was doing the same thing back to him. I called him out on it right away cuz I was sick to my stomach that he would do that, well this past weekend we were with his family and he found out his sisters husband cheated physically and he thought he had every right to say something about it on how he could never do that as that man who cheat are dumb, so on our drive home he could tell I was pissed of and irritated so I told him and he just looked at me and did “ well god thing is I didn’t physically cheat” like as if what he did wasn’t cheating at all.